DE68094C - Recumbent repeater mechanism for grand pianos and table-shaped pianos - Google Patents

Description

IMPERIAL

PATENT OFFICE

The mechanism has the following equipment: A rocker a is attached in a corresponding manner to each key t. At this rocker α the pusher b can be rotated like a hinge, under its short. Leg b ^l a spring fc ² sits, which seeks to keep the pusher b constantly under the hammer cuff c . In addition, a small block k or the like is attached (glued) to each key, against the inclined plane k ^l , which is arranged to the rear, an arm e (repeater arm), which is attached to the rest bar r in a hinge-like manner, and which is held by a fairly strong, however, somewhat resilient wire h is provided on which a stop g is attached.

If the key t is pressed down, the pusher b lifts the hammer collar c, into which the hammer head d with handle is inserted. At the same time, the key lifts the repeater arm e so that it hits an adjustable screw / pusher b by means of its attachment e ¹ and moves it forward against its adjustable stop η you do not pull your finger off the key in order to let the pusher again reach under the hammer, by the slightest movement of the hand or the key the repeater arm e with the stop g is raised and thereby the hammer falling back on the latter due to the elasticity the spring h recently released against the strings.

The light spring e ² , which acts on the repeater arm e , has the purpose of keeping the latter in contact with the relevant key in order to be able to execute all the tones finely. The repeater springs h, to which the stop g is attached, is, by virtue of its elasticity, able to snap the hammer onto the strings at the slightest contact with the falling nut c.

The movement of the pusher b is limited by an adjustable stop η which is attached to the lower end of the hammer bank m so that it can be moved. The key movement is also limited by a 'displaceable stop ρ , which is fastened backwards adjustable on the rest bar.

The advantages of this new one. According to the inventor, the mechanics are as follows:

ι. it is extremely simple as a result of this very easy to assemble and equalize, so that every instrument-maker without all Difficulties can become familiar with it in a short time;

2. Apart from the hammer handle and head, no links in the mechanics are bladed into one another and glued, consequently no angle leg breakage or the like can take place;

3. The friction, especially that of arm e on the inclined plane of block k, is so slight that it cannot be taken into account; also the contact of the arm e with the screw / is noticeable kaμm ;.

4. If you want to remove a key, you simply unscrew the hammer chair.

It should also be mentioned that the keyboard pens are arranged in the following manner Need to become:

If you have a vertical line from the upper edge of the pusher, where the same is the hammer call

lifts, pulls on the key, it must be removed to the center of the balance beam pin 122 mm. The latter must be 268 mm from the center of the front guide pin be distant." . . . .

Claims (1)

Patent claim: Recumbent repeater mechanism for grand pianos and table-shaped pianos, characterized by an arm fe) which is rotatably arranged on the rest bar and rests on the key, which triggers the latter when the key is struck by means of its attachment (e ^l ) and a regulating screw (f) in the pusher, whereupon the Hammernufs falls on a resiliently arranged stop (g) on the arm (e) , which resp. at the slightest movement of the key. of the repeater arm snaps the hammer on the strings again. 1 sheet of drawings.